U.S. patent application number 12/662390 was filed with the patent office on 2011-09-22 for spray switch for spray gun.
This patent application is currently assigned to CHI-HAN CHENG. Invention is credited to Chi-Han Cheng.
Application Number | 20110226875 12/662390 |
Document ID | / |
Family ID | 42244484 |
Filed Date | 2011-09-22 |
United States Patent
Application |
20110226875 |
Kind Code |
A1 |
Cheng; Chi-Han |
September 22, 2011 |
Spray switch for spray gun
Abstract
A spray switch for spray gun includes an elastic wire buckled to
a main pipe of the spray gun. The elastic wire has symmetric
lateral portions and symmetric guide pins on two ends thereof. A
press handle pivoted to a main body of the spray gun is capable of
controlling a flow of water. The press handle has an open slot for
slidly arranging the spray switch. The spray switch is assembled by
a guide block and a buckle unit. The guide block has symmetric
guides and recesses on two lateral sides for guiding and holding
the guide pins. The spray switch can be switched up and down along
the open slot to switch the guide block for engaging or ignoring
the guide pins so as to switch the spray gun between modes of auto
spray and manual spray.
Inventors: |
Cheng; Chi-Han; (Taichung,
TW) |
Assignee: |
CHENG; CHI-HAN
YUAN-MEI CORP.
|
Family ID: |
42244484 |
Appl. No.: |
12/662390 |
Filed: |
April 14, 2010 |
Current U.S.
Class: |
239/526 |
Current CPC
Class: |
B05B 1/3013 20130101;
B05B 9/01 20130101; B05B 1/1645 20130101; B05B 12/0024
20180801 |
Class at
Publication: |
239/526 |
International
Class: |
B05B 9/01 20060101
B05B009/01 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 17, 2010 |
TW |
099107898 |
Claims
1. A spray switch for spray gun comprising: a press handle for
controlling water spray; a spray switch being arranged to the press
handle for switching a spray mode; wherein the spray switch
arranged to the press handle of the spray gun is switched for
changing spray modes between manually controlling the press handle
for spraying or continuous spraying by a single press.
2. The spray switch for spray gun as claimed in claim 1, wherein an
open slot is formed to a side of the press handle; the spray switch
is arranged to the open slot and being switch up and down along the
open slot.
3. The spray switch for spray gun as claimed in claim 1, wherein an
elastic wire having symmetric guide pins on two ends thereof is
clamped to a main pipe of the spray gun; the spray switch has a
guide block having symmetric guide on two lateral sides thereof for
guiding the guide pins; symmetric recesses are formed next to the
guides respectively for temporary holding the guide pins; by
switching the spray switch, the guide block will also be switched
to engage or not to engage the guide pins.
4. The spray switch for spray gun as claimed in claim 3, wherein a
guide block of the spray switch has a sliding hole having symmetric
stoppers on two inner lateral sides; the spray switch has a buckle
unit arranged to an open slot of the press handle and for being
switched up and down in the open slot; an end of the buckle unit
has an enlarged portion so as to keep the buckle unit from falling
out of the open slot; another end of the buckle unit is received
into the sliding hole; two elastic protrusion is formed to two
lateral sides of the buckle unit respectively for buckling the
symmetric stoppers.
5. The spray switch for spray gun comprising: an elastic wire
buckled to a main pipe of a spray gun; the elastic wire having two
parallel lateral sections; two ends of the lateral sections having
two symmetric guide pins; a press handle pivoted to the main pipe
for controlling water spray; wherein the press handle has an open
slot for receiving a spray switch; by switching the spray switch
for changing spray modes between manually controlling the press
handle for spraying or continuous spraying by a single press.
6. The spray switch for spray gun as claimed in claim 5, wherein
the spray switch includes a guide block; the guide block has a
sliding hole having symmetric stoppers on two inner lateral sides;
the guide block has symmetric guides on two outer lateral sides for
guiding the guide pins; two symmetric recesses are formed next to
the guides respectively for temporary holding the guide pins; a
buckle unit is arranged to the open slot for being switched up and
down in the open slot; an end of the buckle unit has an enlarged
portion so as to keep the buckle unit from falling into the open
slot; another end of the buckle unit is received into the sliding
hole; two elastic protrusion is formed to two lateral sides of the
buckle unit respectively for buckling the symmetric stoppers.
7. The spray switch for spray gun as claimed in claim 5, wherein
symmetric upper cuts and symmetric lower cuts are formed to an
inner wall of the open slot; the spray switch has a guide block and
a buckle unit; the buckle unit has symmetric protrusions on two
lateral sides for engaging the cuts while the spray switch is
switched.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to spray switch for spray gun,
and particular to a spray switch arranged to a press handle for
controlling the water spray.
DESCRIPTION OF THE PRIOR ART
[0002] Referring to FIGS. 1 and 2, prior public patent about a
spray gun having a press handle pivoted to a handle of the spray
gun for controlling water flow is descript in the following.
[0003] A spray gun main body 10 consists of a nozzle 12
transversely connected to a vertical main pipe 11. A vertical shaft
13 is formed to a peripheral of the main pipe 11 below the nozzle
12. A platform 14 is formed to a bottom of the nozzle 12 in front
of the vertical shaft 13. A side pipe 111 extends from a middle of
the main pipe 11. A sliding shaft 15 is sealed slid into the side
pipe 111. A valve shaft 16 is arranged inside the main pipe 11
below the side pipe 111. Around a peripheral of a bottom end of the
main pipe 10, symmetric lateral slots 112 and rear slots 113 are
formed. The main pipe 11 is surrounded by a handle 17. The handle
17 is open on the side of the side pipe 111. A compress spring 20
is slid around the side pipe 111, one end of the compress spring 20
is pushed against a junction of the main pipe 11 and the side pipe
111 and another end thereof is pushed against a flange 151 formed
to an end of the side pipe 111.
[0004] An approximate square elastic wire 30 is buckled into the
rear slots 113 with a middle section of the elastic wire 30. Two
parallel sections extending from the middle section of the elastic
wire 30 are buckled into the lateral slots 112. The two end of the
elastic wire 30 are bent towards each other so as to form as two
symmetric guide pins 32.
[0005] A hollow press handle 40 has a receiving chamber 41 inside
the handle 40. Two symmetric holes 42 are formed to an upper end of
the press handle 40 so that the press handle 42 is pivoted to the
vertical shaft 13 of the main body 10. An open side of the press
handle 40 is faced to the handle 17, and a part of the open side of
the press handle 40 can be inserted into the open side of the
handle 17. A slot 43 is formed to a bottom of the receiving chamber
41, a guide block 44 is fixed to the slot 43. A predetermined space
is formed between the two lateral sides of the guide block 44 and
the opposite inner wall of the receiving chamber 41. Two symmetric
guide slots 441 and recesses 442 are formed to the two lateral
sides of the guide block 44 respectively.
[0006] Normally, the flange 151 is push against an inner wall of
the press handle 40. By the compress spring 20 pushing, the sliding
shaft 15 pushes the press handle 40 so that a top of the press
handle 40 is contacted to the platform 14 of the nozzle 12.
[0007] While water comes into the main pipe 11, the valve shaft 16
inside the main pipe 11 will be pushed upwards by the water flow to
seal an inlet of the main pipe 11. In the mean time, an upper end
of the valve shaft 16 contacts to an end of the sliding shaft 15
inside the side pipe 111.
[0008] While the press handle 40 is pushed towards the handle 17,
the guide block 44 will be moved towards the guide pin 32. The
guide pins 32 will be bent upwards and slid along an upper rim of
the recesses 442 and an upper rim of the guides 441 while the press
handle 40 is firstly pressed, the guide pins 32 will be held into
the recesses 442 while the press handle 40 is released so that the
spray gun is able to continuous spray water as the press handle 40
is held. Also, the sliding shaft 15 is slid into the side pipe 111
and the valve shaft 16 is thus pushed so that water will flow into
the main pipe 11.
[0009] After the second press and release of the press handle 40,
the guide pins 32 will leave the recesses 442 and the press handle
40 is back to the origin position by the force of the compress
spring 20.
[0010] Two Japan patents of no. JP-A-2005-138056 and
JP-A-2009-22848 also have the same function with the above
technique. The spray nozzle can continuously spray by a single
pressing.
[0011] However, such spray nozzle does not have other operating
mode. The water flow can not be controlled by the handle.
SUMMARY OF THE PRESENT INVENTION
[0012] Accordingly, the primary object of the present invention is
to provide a spray switch for spray gun capable of switch between
operation modes of auto spray and manual spray with water flow
control.
[0013] To achieve above object, the spray switch includes an
elastic wire buckled to a main pipe of the spray gun. The elastic
wire has symmetric lateral portions and symmetric guide pins on two
ends thereof. A press handle pivoted to a main body of the spray
gun is capable of control a flow of water. The press handle has an
open slot for slidly arranging the spray switch. The spray switch
is assembled by a guide block and a buckle unit. The guide block
has symmetric guides and recesses on two lateral sides for guiding
and holding the guide pins. The spray switch can be switched up and
down along the open slot to switch the guide block for engaging or
ignoring the guide pins so as to switch the spray gun between modes
of auto spray and manual spray.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] FIG. 1 is a perspective view showing a spray switch of a
prior art.
[0015] FIG. 2 is an exploded view showing a spray switch and a
press handle of a prior art.
[0016] FIG. 3 is an exploded view showing a preferable embodiment
of the present invention.
[0017] FIG. 4 is a schematic view showing a bottom of a main pipe
of the preferable embodiment of the present invention.
[0018] FIG. 5 is a rear view showing a buckle unit of the spray
switch of the present invention.
[0019] FIG. 6 is a rear view showing a guide block of the spray
switch of the present invention.
[0020] FIG. 7 is an assembly view of the preferable embodiment of
the present invention.
[0021] FIG. 8 is a cross-section view of FIG. 7 along an A-A
line.
[0022] FIG. 9 is a rear view showing the press handle of the
preferable embodiment of the present invention.
[0023] FIG. 10 is a perspective view (1) showing the assembly of
the present invention.
[0024] FIG. 11 is a schematic view showing an operation of the
present invention.
[0025] FIG. 12 is a perspective view (2) showing the assembly of
the present invention.
[0026] FIG. 13 is a schematic view showing the operation of FIG.
12.
[0027] FIG. 14 is a perspective view showing another embodiment of
the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0028] In order that those skilled in the art can further
understand the present invention, a description will be provided in
the following in details. However, these descriptions and the
appended drawings are only used to cause those skilled in the art
to understand the objects, features, and characteristics of the
present invention, but not to be used to confine the scope and
spirit of the present invention defined in the appended claims.
[0029] Referring to FIGS. 3 to 10, a preferable embodiment of a
spray switch for spray gun according to the present invention is
illustrated. A main body 10 of the spray gun has a vertical main
pipe 11, a nozzle 12 is horizontally connected to the main pipe 11
on a top thereof. A transverse shaft 13 is arranged to the main
pipe 11 below the nozzle 12. A platform 14 is formed to a bottom of
the nozzle 12 in front of the transverse shaft 13. A side pipe 111
extends from a middle of the main pipe 11. A sliding shaft 15 is
sealed slid into the side pipe 111. A valve shaft 16 is arranged
inside the main pipe 11 below the side pipe 111. Around a
peripheral of a bottom end of the main pipe 10, symmetric lateral
slots 112 and rear slots 113 are formed. The main pipe 11 is
surrounded by a handle 17. The handle 17 has an open on the side of
the side pipe 111. A compress spring 20 is slid around the side
pipe 111, one end of the compress spring 20 is pushed against a
junction of the main pipe 11 and the side pipe 111 and another end
thereof is pushed against a flange 151 formed to an end of the
sliding shaft 15.
[0030] An approximate square elastic wire 30 is buckled into the
rear slots 113 with a middle, section of the elastic wire 30. Two
parallel lateral sections 31 extending from the middle section of
the elastic wire 30 are buckled into the lateral slots 112. The two
end of the elastic wire 30 are bent towards each other so as to
form as two symmetric guide pins 32.
[0031] A hollow press handle 40 has a receiving chamber 41 inside
the handle 40. Two symmetric holes 42 are formed to an upper end of
the press handle 40 for being pivoted to the vertical shaft 13 of
the main body 10. An open side of the press handle 40 is faced to
the handle 17, and a part of the press handle 40 can be received
into the open side of the handle 17. The flange 151 is push against
an inner wall of the press handle 40. By the compress spring 20,
the sliding shaft 15 pushes the press handle 40 so that a top of
the press handle 40 will be stopped by the platform 14 below the
nozzle 12.
[0032] While water comes into the main pipe 11, the valve shaft 16
inside the main pipe 11 will be pushed upwards by the water flow so
that an upper end of the valve shaft 16 will seal an inlet of the
main pipe 11. In the mean time, the upper end of the valve shaft 16
will touch an end of the sliding shaft 15 of the side pipe 111.
While the press handle 40 is pushed towards the handle 17, the
sliding shaft 15 is slid along the side pipe 111 and the valve
shaft 16 will be pushed away from the inlet so that water will flow
into the main pipe 11.
[0033] The description above is about the spray gun. The spray
switch 46 according to the present invention has a guide block 461
and a buckle unit 462. An open slot 45 is formed to a lower end of
the receiving chamber 41 of the press handle 40. The spray switch
46 is arranged to the open 45 and can be switched up and down in
the open slot 45.
[0034] The guide block 461 has a sliding hole 4611 for receiving
the buckle unit 462. A stopper 4612 is formed to two inner lateral
walls of the sliding hole 46 respectively. A guide 4613 is formed
to two lateral sides of the guide block 461 respectively for
guiding the guide pin 32. A recess 4614 is formed near an end of
the guide 4613 for temporary holding the guide pin 32.
[0035] The buckle unit 462 is arranged to the open slot 45 and can
be switched up and down through the open slot 45. An end of the
buckle unit 462 is enlarged as an enlarged portion 4621, and the
width of the enlarged portion 4621 is wider than the width of the
open slot 45 so that the buckle unit 462 can be arranged to the
open slot 45 without falling into the receiving chamber 41. An
elastic protrusion 4622 is formed to two lateral sides of the
buckle unit 462 respectively.
[0036] The buckle unit 462 passing through the open slot 45 is
inserted into the guide block 461 inside the receiving chamber 41.
By the elastic protrusions 4622 being buckled to the stoppers 4612
inside the sliding hole 4611, the spray switch 46 is arranged to
the open slot 45 and can be switched up and down along the open
slot 45.
[0037] Therefore, the guide pins 32 will not contact the guide
block 461 while the spray switch 46 are switched to an up position
along the open slot 45. The spray gun can be operated by holding or
releasing the press handle 40 to spray or not to spray as shown in
FIGS. 12 and 13.
[0038] Referring to FIGS. 10 and 11, the spray switch 46 is
switched to a down position along the open slot 45. The guide pins
32 will be bent upwards and slid along an upper rim of the recesses
4614 and an upper rim of the guides 4613 while the press handle 40
is firstly pressed, the guide pins 32 will be held into the
recesses 4614 while the press handle 40 is released so that the
press handle 40 will remain pressed and the spray gun will
continuously spray water. After the second press and release the
press handle 40, the guide pins 32 will leave the recesses 4614 and
the press handle 40 is back to the origin position.
[0039] Therefore, the above assembly is capable of switching
between two spray modes of manually controlling the press handle
for spraying or continuous spraying by a single press depending on
the needs.
[0040] Moreover, to ensure the spray switch 46 is actually switched
to the up and the down positions, symmetric upper cuts 451 and
symmetric lower cuts 452 are formed to the open slot 45. The buckle
unit 462 has symmetric protrusions 4623 on two lateral sides for
engaging the cuts 451 and 452 while the spray switch 46 is
switched.
[0041] The above preferable embodiment has the press handle 40
pivoted to the same side of the nozzle. However, it is not the only
embodiment of the present invention. Referring to FIG. 14, the
press handle 40 with the spray switch 46 can be also pivoted to a
relative rear side of the nozzle 12.
[0042] The present invention is thus described, it will be obvious
that the same may be varied in many ways. Such variations are not
to be regarded as a departure from the spirit and scope of the
present invention, and all such modifications as would be obvious
to one skilled in the art are intended to be included within the
scope of the following claims.
* * * * *